Photo by Ron Bishop Guardsmen stand watch A fire at Seventh and Lyons destroyed an abandoned school building late Tuesday night while Lawrence was under a dusk to dawn curfew. National guardsmen protected the firemen as they battled the blaze. The precaution was taken after sniper fire had hit a firetruck while answering a fire call earlier in the evening. Dusk to dawn curfew order by Docking Governor Robert Docking ordered a curfew in and around Lawrence for a three mile radius from 7 p.m. Tuesday evening until 6 a.m. Wednesday morning. The statement was made Tuesday afternoon by Jim Schaffer, press relations official for governor. The governor also ordered 25 members of the Kansas Highway Patrol and additional National Guard members from the 1st Battalion, 127 Artillery at Ottawa to be stationed at the perimeter of the city. Schaffer said the troops would remain at the edge of the city unless city officials request that they move into the city limits. The order was issued at the request of Donald Metzler, Lawrence mayor, and Daniel Young, Douglas County attorney. Francis Heller, dean of faculties, in cooperation with SenEx, said the curfew would also pertain to the University of Kansas campus. All campus events for Tuesday evening have been cancelled and students are being asked to stay off the streets. Unless they were requested by the local authorities, state patrolmen and other such police protection would not be released to the Lawrence area, Governor Docking said in a press conference early Tuesday morning. "We won't unilaterally send troops unless the situation demands it." Docking said. In a press release Docking said: "Disrespect and disregard for Apr. 22 1970 KANSAN 3 the law cannot and will not be tolerated. As Governor of Kansas, I give my full support to the protection of the individual and his property. "Local law enforcement officials have been notified that if state assistance is needed to maintain order, the Governor's Office stands ready and fully prepared to cooperate with them. This office will take all necessary steps to maintain respect for the laws of our state." Docking referred to the Kansas Union as a "bonded" building. He said the building is on a 90 per cent co-insurance basis. Under such a plan, 90 per cent of the value of the building is covered. The building also has business interruption insurance, Docking said. He said it was insured for $5\frac{1}{2}$ million dollars. Docking said that he knew of no such incidents spreading to other campuses in the state. There was no obvious link with other incidents in Wichita, Topeka and Kansas City, he said. Officials are assessing the potential of the problem and are working on the fire incidents with a strong suspicion of arson, Docking said. Penn State sit-in ends four persons arrested UNIVERSITY PARK, Pa. (UPI) —About 50 students peacefully ended a brief sit-in at the main administration building of Pennsylvania State University Tuesday after riot-equipped state troopers were called to the campus for the second time in a week. Four persons were arrested, police said, two of them on charges stemming from last week's antiwar protest which triggered a week of unrest on the huge campus. Earlier Tuesday, militants fire-bombed some buildings and stoned the home of the school President, Eric A. Walker, forcing him and his wife to flee. The troopers, about 100 strong and clad in riot helmets and carrying long sticks, moved onto the campus at the request of university officials and formed a ring around the administration building, Old Main, shortly before the building's 5 p.m. closing. Fires were set in five girls' dormitories and a cottage. A classroom building and an office building were fire-bombed. The fires were extinguished quickly by campus police and damage was minor. There were no injuries but 1,250 girl students and 560 male students were forced to evacuate the dormitories for up to two hours. A total of 24,000 students are at the main campus. Earth Day campaigns set throughout nation There was not a gas mask to be had today in Omaha, Neb. They were sold out in preparation for today's Earth Day demonstrations. Earth Day "save the environment," "give earth a chance," and hundreds of other campaigns, spread into virtually every corner of the nation as people urged themselves and others to protect and clean up the environment. Plans for the day ranged from the bizarre to simple pick-up-the litter drives. About 20 per cent of the population of New York City was expected to be involved in some way. The White House said Tuesday President Nixon welcomed the day's events and "feels the activities show the concern of people of all walks of life over the dangers to our environment." Skywriting planes were to inscribe the word "air" in the atmosphere over Los Angeles. Ohio State University students planned a guided walk along the Olentangy River. Ashtabula, Ohio, residents were set for a "premature funeral for the children of tomorrow," to dramatize the unborn children who will die from pollution. Southeast Missouri State students planned a mock funeral to "symbolically bury the earth under a pile of trash." Miami citizens scheduled a "dead orange parade" with a prize for the "most polluted float." The Michigan House approved by a 98-3 vote a bill which would give private citizens the right to take legal action against polluters. Chicago's Commonwealth Edison Co., a target of local pollution fighters, announced Tuesday it has formed an environmental advisory council, composed of doctors, educators and scientists. Seven thousand persons jammed a "declaration of interdependence" rally Tuesday at Philadelphia's Independence Hall. 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